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    • 6. 发明授权
    • Molecular sieve/polymer asymmetric flat sheet mixed matrix membranes
    • 分子筛/聚合物不对称平板混合基质膜
    • US08226862B2
    • 2012-07-24
    • US11954454
    • 2007-12-12
    • Chunqing LiuStephen T. WilsonDavid A. Lesch
    • Chunqing LiuStephen T. WilsonDavid A. Lesch
    • B29D7/00
    • B01D69/148B01D67/0079B01D69/06B01D71/028B01D2325/022
    • The present invention discloses an approach for making mixed matrix membranes (MMMs) and methods for using these membranes. These MMMs contain a continuous polymer matrix and dispersed microporous molecular sieve particles. This invention also pertains to control of the thickness of the thin dense selective mixed matrix membrane layer that is equal to or greater than the particle size of the largest molecular sieve particles for making large scale asymmetric MMMs. In particular, the invention is directed to making asymmetric flat sheet MMM by a phase inversion technique. The MMMs of the present invention exhibit at least 20% increase in selectivity compared to the polymer membranes prepared from their corresponding continuous polymer matrices. The MMMs of the present invention are suitable for a variety of liquid, gas, and vapor separations.
    • 本发明公开了一种制备混合基质膜(MMM)的方法和使用这些膜的方法。 这些MMM含有连续的聚合物基质和分散的微孔分子筛颗粒。 本发明还涉及等于或大于用于制造大规模不对称MMM的最大分子筛颗粒的粒度的薄致密选择性混合基质膜层的厚度的控制。 特别地,本发明涉及通过相位反转技术制造不对称平板MMM。 与由其相应的连续聚合物基质制备的聚合物膜相比,本发明的MMM显示出至少20%的选择性增加。 本发明的MMM适用于各种液体,气体和蒸气分离。
    • 10. 发明授权
    • UV-cross-linked membranes from polymers of intrinsic microporosity for liquid separations
    • 用于液体分离的内在微孔的聚合物的UV交联膜
    • US07758751B1
    • 2010-07-20
    • US11564672
    • 2006-11-29
    • Chunqing LiuStephen T. WilsonDavid A. Lesch
    • Chunqing LiuStephen T. WilsonDavid A. Lesch
    • B01D63/00
    • B01D67/0006B01D53/228B01D2323/30B01D2323/345C10G31/11
    • The present invention is for high performance UV-cross-linked membranes from polymers of intrinsic microporosity (PIMs) and the use of such membranes for separations. More specifically, the invention involves the methods of making UV-cross-linked membranes from PIMs. These membranes were prepared by cross-linking the UV-cross-linkable membranes from PIMs by exposure to UV-radiation. Pure gas permeation test results demonstrate that the UV-cross-linked membranes from PIMs exhibit CO2/CH4 performance well above the Robeson's polymer upper bound trade-off curve for CO2/CH4 separation. They have more than doubled selectivity for CO2/CH4 and extremely high permeability of CO2 compared to the original UV-cross-linkable membranes from PIMs. These membranes also show excellent separation performance for CO2/N2, H2/CH4, O2/N2, and propylene/propane separations. These high performance UV-cross-linked membranes are very useful for gas and liquid separations such as CO2/CH4, CO2/N2, H2/CH4, O2/N2, olefin/paraffin, deep desulfurization of gasoline and diesel fuels, and ethanol/water separations.
    • 本发明是用于由本征微孔(PIM)的聚合物制成的高性能紫外线交联膜和用于分离的这种膜的用途。 更具体地,本发明涉及从PIM制备UV-交联膜的方法。 这些膜是通过暴露于UV辐射下从PIM交联UV可交联膜来制备的。 纯气体渗透测试结果表明,来自PIM的UV交联膜表现出远远高于Robeson的CO 2 / CH 4分离的聚合物上限折衷曲线的CO2 / CH4性能。 与原来的PIM可交联膜相比,它们对二氧化碳/ CH4的选择性提高了一倍以上,二氧化碳渗透率极高。 这些膜对于CO 2 / N 2,H 2 / CH 4,O 2 / N 2和丙烯/丙烷分离也表现出优异的分离性能。 这些高性能的紫外线交联膜对于气体和液体分离如CO 2 / CH 4,CO 2 / N 2,H 2 / CH 4,O 2 / N 2,烯烃/石蜡,汽油和柴油燃料的深度脱硫以及乙醇/ 水分离。